Tag: M.W=100-150

Yang, Zhi-Wang published the artcileBaeyer-Villiger oxidation and acetalization of cyclic ketones on SO^2-₄/SnO₂-Fe₂O₃ solid acid catalysts, Formula: C8H14O2, the publication is Wuli Huaxue Xuebao (2012), 28(9), 2148-2154, database is CAplus.

Fe-doped SO^2-₄/SnO₂ (STF) solid acid catalysts with different amounts of iron were prepared via co-condensation, followed by sulfation and calcination. These materials were characterized by Fourier transform IR (FTIR) spectroscopy, x-ray powder diffraction (XRD), N₂ adsorption-desorption anal. (BET), thermogravimetric (TG) anal., and SEM. The Fe-doped catalysts exhibited more activity than undoped catalysts in acetalization reactions of 4-tert-butylcyclohexanone and diols. The catalytic acetalization of several ketones and 1,2-diols with the SO^2-₄/SnO₂-Fe₂O₃ catalysts (with the Fe/Sn molar ratio of 0.5) were studied. The influence of the reaction time and the amount of the catalysts on the acetalization were also investigated. In addition, the high performance of this Fe-modified catalyst was demonstrated in the Baeyer-Villiger oxidation of cyclic ketones. The catalyst can be recycled several times without any significant loss in catalytic activity.

Wuli Huaxue Xuebao published new progress about 177-10-6. 177-10-6 belongs to dioxole, auxiliary class Dioxolane,Spiro, name is 1,4-Dioxaspiro[4.5]decane, and the molecular formula is C12H23N3S, Formula: C8H14O2.

Referemce:
https://en.wikipedia.org/wiki/1,3-Benzodioxole,
Dioxole | C3H4O2 – PubChem

Lin, Junzhong published the artcileHierarchical Shell-Like ZSM-5 with Tunable Porosity Synthesized by using a Dissolution-Recrystallization Approach, Quality Control of 177-10-6, the publication is Chemistry – A European Journal (2018), 24(56), 14974-14981, database is CAplus and MEDLINE.

Zeolites have been widely used in various fields in industry, such as catalysis, separation, and adsorption, etc. The small pore size of the micropores in the zeolite could lead to severe diffusion resistance in mass transfer. Numerous efforts have been dedicated to imposing hierarchical pore systems into zeolites by using templates or leaching methods. Here, we report the synthesis of single-crystalline hierarchical shell-like ZSM-5 by utilizing a dissolution-recrystallization post-treatment on mesoporous ZSM-5. Tetrapropylammonium hydroxide solution was used in the post-treatment. The hierarchical porosity in the crystalline shell can be controlled by adding sodium cations into the synthesis system. The hierarchical shell-like ZSM-5 reported here shows higher catalytic activity in acetalization reactions containing bulky mols.

Chemistry – A European Journal published new progress about 177-10-6. 177-10-6 belongs to dioxole, auxiliary class Dioxolane,Spiro, name is 1,4-Dioxaspiro[4.5]decane, and the molecular formula is C8H14O2, Quality Control of 177-10-6.

Referemce:
https://en.wikipedia.org/wiki/1,3-Benzodioxole,
Dioxole | C3H4O2 – PubChem

Hou, Wenqian published the artcileRapidly monitoring the quality of flavoring essence based on microwave-induced plasma ionization mass spectrometry and multivariate statistical analysis, SDS of cas: 1193-11-9, the publication is Talanta (2019), 97-104, database is CAplus and MEDLINE.

Microwave-induced plasma ionization mass spectrometry (MIPI-MS) combined with multivariate statistical anal. was first applied to rapidly monitor the quality of tobacco flavoring essence. A small isolation and reaction chamber was set up between the ion source and the injection port of mass spectrometer to effectively eliminate the interference of external environment in the process of analyzing samples. The improved exptl. apparatus (MIPI-MS) could achieve online and high-throughput anal., with minimal sample preparation steps. Further, two types of tobacco flavoring essences with the similar appearance and physicochem. parameters were employed to verify the usability of the promising method in the field of quality monitoring. Firstly, the mass spectral fingerprint of each essence was established by the improved MIPI-MS method within 2 min. Then, two multivariate statistical processes were carried out to analyze mass spectral data. The similarity results indicated that the thresholds of tobacco flavoring essences from different batches were 1.512 and 2.638, resp. The first three principal components of the established PLS-DA described 93.6% of the total variability, and provided a visualized comparison for the two types of flavoring materials. Finally, the adulterated samples were successfully distinguished by employing the two multivariate statistical processes.

Talanta published new progress about 1193-11-9. 1193-11-9 belongs to dioxole, auxiliary class Dioxolanes, name is 2,2,4-Trimethyl-1,3-dioxolane, and the molecular formula is C6H12O2, SDS of cas: 1193-11-9.

Referemce:
https://en.wikipedia.org/wiki/1,3-Benzodioxole,
Dioxole | C3H4O2 – PubChem

Spada, Fernanda Papa published the artcileComprehensive chocolate aroma characterization in beverages containing jackfruit seed flours and cocoa powder, Recommanded Product: 2,2,4-Trimethyl-1,3-dioxolane, the publication is Future Foods (2022), 100158, database is CAplus.

Jackfruit (Artocarpus heterophyllus Lam) occurs abundantly in Brazil, but its seeds are often underutilized in food nutrition. Previously, we showed that roasted jackfruit seeds are an innovative source of chocolate aroma. In this study, we characterized the volatile content of exptl. beverages containing jackfruit seed flours as compared to non-alk. cocoa powder. The three key results of this study were that (i) the fermented jackfruit seed flour beverage (FJSBev) was similar to the non-alk. cocoa powder beverage (CTRLBev); (ii) similar volatile groups (acids, alcs., aldehydes, ester, furans, and pyrazines) were identified in the samples (FJSBev and CTRLBev); (iii) the beverages contained volatile compounds with a low threshold of cocoa attributes (butter, cocoa, coffee, floral, fruit, green, honey, mushroom, nut, and roasted). To conclude, the beverage formulation containing fermented jackfruit seeds had more volatile compounds and odor-active constituents than that with non-alk. cocoa powder. Collectively, our data demonstrate that fermentation is critical to producing a chocolate aroma. Fermented jackfruit seed flours could be used as a partial or total additive to improve chocolate aroma in food formulations.

Future Foods published new progress about 1193-11-9. 1193-11-9 belongs to dioxole, auxiliary class Dioxolanes, name is 2,2,4-Trimethyl-1,3-dioxolane, and the molecular formula is C17H28ClNO3, Recommanded Product: 2,2,4-Trimethyl-1,3-dioxolane.

Referemce:
https://en.wikipedia.org/wiki/1,3-Benzodioxole,
Dioxole | C3H4O2 – PubChem

Ibezim, Akachukwu published the artcileBinding of anti-Trypanosoma natural products from African flora against selected drug targets: a docking study, Recommanded Product: 1,4-Dioxaspiro[4.5]decane, the publication is Medicinal Chemistry Research (2017), 26(3), 562-579, database is CAplus.

Recent publications have suggested that African medicinal plants and their derived products could be viable source of new and better trypanocidal drugs. Nowadays, in silico methods are often used in drug discovery processes to identify new potential drug leads. In this study, the authors have developed a small library named Afrotryp, comprising three-dimensional chem. structures of potential trypanocidal compounds derived from medicinal plants in Africa (a total of 321 unique chem. structures). The authors have predicted the pharmacokinetic properties of the library using Qikprop software and employed the three docking/scoring methods implemented in Mol. Operating Environment Dock Tool to assess the affinity of the library dataset towards the binding site of six selected validated anti-Trypanosoma drug targets. It was observed that about 42% of the compounds contained in the Afrotryp dataset were predicted to show a good overall performance in terms of predicted parameters for absorption, distribution, metabolism, elimination and toxicity properties. Docking calculations identified 15 compounds with lowest theor. binding energies toward the studied proteins, nine of which are suited for the treatment of stage 2 human African trypanosomiasis, due to their low polar surface area. Anal. of their binding modes gave basis for the observed unique mol. interactions which exist between the Afrotryp dataset and the six studied drug targets. The results lay the foundations for the rational development of novel trypanocidal drugs with improved potency.

Medicinal Chemistry Research published new progress about 177-10-6. 177-10-6 belongs to dioxole, auxiliary class Dioxolane,Spiro, name is 1,4-Dioxaspiro[4.5]decane, and the molecular formula is C8H14O2, Recommanded Product: 1,4-Dioxaspiro[4.5]decane.

Referemce:
https://en.wikipedia.org/wiki/1,3-Benzodioxole,
Dioxole | C3H4O2 – PubChem

Xu, Ruofei published the artcileExploitation and application of natural edible fungi as cigarette flavor, HPLC of Formula: 1193-11-9, the publication is Jingxi Huagong (2006), 23(11), 1089-1093, database is CAplus.

Three special natural perfumes as cigarette flavor were produced by water distillation, enzyme treating and Maillard reaction from natural edible fungi: Lentinus edodes. The experiments with the perfumes were conducted. The results showed that special fragrant was endowed and smoking and moist quality of cigarette was significantly improved with the cigarette flavor by enzyme treating; both fragrant and sweet of cigarette were improved and smoking was soft with the cigarette flavor by Maillard reaction; and fragrant was improved and awful aftertaste was effectively reduced with the cigarette flavor by water distillation The volatile components in the perfumes were analyzed, and 23, 50 and 38 compounds were identified in the cigarette flavors by water distillation, enzyme treating and Maillard reaction resp.

Jingxi Huagong published new progress about 1193-11-9. 1193-11-9 belongs to dioxole, auxiliary class Dioxolanes, name is 2,2,4-Trimethyl-1,3-dioxolane, and the molecular formula is C15H18BF3O2, HPLC of Formula: 1193-11-9.

Referemce:
https://en.wikipedia.org/wiki/1,3-Benzodioxole,
Dioxole | C3H4O2 – PubChem

Leggetter, B. E. published the artcileThe relative ease of reductive cleavage of 1,3-dioxolanes and 1,3-dioxanes in ether solution by LiAlH₄-AlCl₃, Synthetic Route of 1193-11-9, the publication is Canadian Journal of Chemistry (1964), 42(9), 2113-18, database is CAplus.

In ether solution, 1,3-dioxolanes are hydrogenolyzed faster by LiAlH₄-AlCl₃ than are the corresponding 1,3-dioxanes. This difference is attributed to the relative ease of oxocarbonium ion formation in the rate-determining step of the reaction. The results obtained have been utilized to explain the selective cleavage of the five- and six-membered acetal structures found in the polyacetals of hexitols.

Canadian Journal of Chemistry published new progress about 1193-11-9. 1193-11-9 belongs to dioxole, auxiliary class Dioxolanes, name is 2,2,4-Trimethyl-1,3-dioxolane, and the molecular formula is C6H12O2, Synthetic Route of 1193-11-9.

Referemce:
https://en.wikipedia.org/wiki/1,3-Benzodioxole,
Dioxole | C3H4O2 – PubChem

Flores, Rosa M. published the artcileEvaluation of multistep derivatization methods for identification and quantification of oxygenated species in organic aerosol, Product Details of C6H12O2, the publication is Journal of Chromatography A (2015), 1-11, database is CAplus and MEDLINE.

Two, 3-step methods to derivatize mono- and multi-functional species with carbonyl (C=O), carboxylic acid (-COOH), and alc. (-OH) moieties were compared and optimized. In Method 1, C=O, -COOH, and -OH moieties were converted to methyloximes (R-C=N-OCH₃) with O-methylhydroxylamine hydrochloride (MHA); to Me esters (O=C-R-OCH₃) with (trimethylsilyl)diazomethane in methanol (TMSD/MeOH); and to trimethylsilyl ethers [R-OSi(CH₃)₃] with N,O-bis(trimethylsilyl)-trifluoroacetamide (BSTFA) containing 1% trimethylchlorosilane, resp. Steps 1 and 3 of methods were identical; however, in Step 2 of Method 2, -COOH moieties were derivatized with 10% (volume/volume) BF₃ in MeOH or n-butanol (n-BuOH). The BF₃/MeOH and BF₃/n-BuOH were ineffective at converting species with >2-OH moieties. Average standard deviations for derivatization of 36 model compounds by the 3-step methods using TMSD/MeOH and BF₃/MeOH were 7.4 and 14.8%, resp. Average derivatization efficiencies for Methods 1 and 2 were 88.0 and 114%, resp. Despite the lower average derivatization efficiency of Method 1, distinct advantages included a greater certainty of derivatization yield for the entire suite of mono- and multi-functional species and fewer processing steps for sequential derivatization. Detection limits for Method 1 using multi-dimensional gas chromatog./time of flight mass spectrometry (GC × GC-ToF-MS) were 0.3-54 pg/m³. Approx. 100 oxygenated organic species were identified and quantified in aerosols filtered from 39 m³ air in an urban location. Levels of species were 0.013-17 ng/m³ and were nearly all above Method 1 limits of detection.

Journal of Chromatography A published new progress about 1193-11-9. 1193-11-9 belongs to dioxole, auxiliary class Dioxolanes, name is 2,2,4-Trimethyl-1,3-dioxolane, and the molecular formula is C6H12O2, Product Details of C6H12O2.

Referemce:
https://en.wikipedia.org/wiki/1,3-Benzodioxole,
Dioxole | C3H4O2 – PubChem

Ma, Hong-Xin published the artcileControllable assembly, characterization and catalytic properties of a new Strandberg-type organophosphotungstate, SDS of cas: 177-10-6, the publication is Dalton Transactions (2016), 45(4), 1631-1637, database is CAplus and MEDLINE.

Using phenylphosphonic acid, simple tungstate and Cu(II) compounds as starting materials, an organic-inorganic hybrid Strandberg-type organophosphotungstate, {[(Cu(H₂O)(μ-bipy))₂(C₆H₅PO₃)₂W₅O₁₅]}_n (bipy = 4,4′-bipyridyl) (1), was assembled successfully under hydrothermal conditions and characterized by physicochem. and spectroscopic methods. Compound 1 represents the 1st example of a transition metal complex modified organophosphotungstate cluster. In the crystal structure of 1, the polymeric 1-dimensional {Cu-bipy}_n chains are interconnected by [(C₆H₅PO₃)₂W₅O₁₅]^4- (abbreviated as {(C₆H₅P)₂W₅}) units into a 3-dimensional framework. A hollow Keggin isopolytungstate [H₂W₁₂O₄₀]^6- ({W₁₂})-Cu(II) coordination polymer, {[Cu(bipy)₂((μ-bipy)Cu(bipy))₂(H₂W₁₂O₄₀)]·12H₂O}_n (2), was obtained at different molar ratios of the starting materials and pH. The two Cu(II) coordination polymers exhibit good acid-catalytic activity for the synthesis of cyclohexanone ethylene ketal. Their fluorescence properties were studied.

Dalton Transactions published new progress about 177-10-6. 177-10-6 belongs to dioxole, auxiliary class Dioxolane,Spiro, name is 1,4-Dioxaspiro[4.5]decane, and the molecular formula is C8H14O2, SDS of cas: 177-10-6.

Referemce:
https://en.wikipedia.org/wiki/1,3-Benzodioxole,
Dioxole | C3H4O2 – PubChem

Shao, Linjun published the artcilePolyacrylonitrile fiber mat supported solid acid catalyst for acetalization, Recommanded Product: 1,4-Dioxaspiro[4.5]decane, the publication is Monatshefte fuer Chemie (2012), 143(8), 1199-1203, database is CAplus.

A novel polyacrylonitrile hybrid fiber mat supported solid acid catalyst was prepared by electrospinning, and its catalytic activities were carefully investigated through acetalization reactions. The results showed that this hybrid fiber mat exhibits high activity for the reactions, with average yields over 95%. Besides having catalytic activities similar to the solid acid, the heterogeneous solid acid/polyacrylonitrile mat can be reused in six runs without significant loss of catalytic activities. The large size of the hybrid fiber mat greatly facilitates recovery of the catalyst from the reaction mixture The high and stable catalytic activities of the hybrid fiber mat hold great potential for green chem. processes and preparation of membrane reactors in the future.

Monatshefte fuer Chemie published new progress about 177-10-6. 177-10-6 belongs to dioxole, auxiliary class Dioxolane,Spiro, name is 1,4-Dioxaspiro[4.5]decane, and the molecular formula is C65H82N2O18S2, Recommanded Product: 1,4-Dioxaspiro[4.5]decane.

Referemce:
https://en.wikipedia.org/wiki/1,3-Benzodioxole,
Dioxole | C3H4O2 – PubChem